Home / 2,930.78-4,394.21-1,615.16

Finding the Fourth Proportional to 2,930.78, 4,394.21 and 1,615.16

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Solution

The fourth proportional to 2,930.78, 4,394.21 and 1,615.16 is: 2,421.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,930.78 : 4,394.21 = 1,615.16 : x
  2. Step 2: Convert to fraction form
    2,930.78/4,394.21 = 1,615.16/x
  3. Step 3: Cross multiply
    2,930.78x = 4,394.21 × 1,615.16
  4. Step 4: Simplify right side
    2,930.78x = 7,097,322.18
  5. Step 5: Solve for x
    x = 7,097,322.18/2,930.78
  6. Step 6: Final answer
    x = 2,421.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.